| Cover | Jul. 29, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jul. 29, 2021 |
| Entity File Number | 001-35561 |
| Entity Registrant Name | IDEANOMICS, INC. |
| Entity Central Index Key | 0000837852 |
| Entity Tax Identification Number | 20-1778374 |
| Entity Incorporation, State or Country Code | NV |
| Entity Address, Address Line One | 1441 Broadway |
| Entity Address, Address Line Two | Suite 5116 |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10018 |
| City Area Code | 212 |
| Local Phone Number | 206-1216 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock, $0.001 par value per share |
| Trading Symbol | IDEX |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
